Thread Rating:
  • 0 Vote(s) - 0 Average
[MAC] AC3 and DTS pass-through help?
I'm having some trouble getting AC3 and DTS files properly passing through to my receiver. This seemed to not be an issue before, as I was using a Toslink cable. My new receiver does not allow me to use a Toslink + HDMI sound combo like my old one did for sound and this presents a problem.

I purchased the monoprice usb + displayport to hdmi ( adapter to fix this problem, however I'm running into one problem. I cannot get the XBMC to properly pass the correct AC3 and DTS through to the receiver. Here's what I've done so far.

Audo source info: AC3, 5.1 (L R C LFE Ls Rs), 48.000 kHz
Testing with Quicktime 10 first, then XBMC 9.11(release off website)
Settings from website:
Audio MIDI Setup: Format 48000.0 Hz and 2ch-16bit on the correct sound device (currently lists as USB Sound device)

Computer i'm using:
MacBook Pro 2.4ghz Intel Core2Duo 4GBram OSX 10.6.2

Attempt 1:
Perian Ver: 1.2 set to Audio outpus Multi-Channel output
Add AC3+DTS passthrough terminal passthrough settings
Quicktime properly plays the AC3 file to my receiver, all channels.
Audio Settings in XBMC Digital (Without AC3 and DTS capable receiver checked)
Play same file in XBMC, and i only get stereo with these settings.

If I check Dolby Digital AC3 and DTS capable receiver, the file plays slowly in XBMC with no sound and no channels show up on my receiver.

Attempt 2:
remove passthrough terminal passthrough settings
Quicktime plays in stereo
Audio Settings in XBMC Digital (Without AC3 and DTS capable receiver checked) - Plays stereo
Check AC3 and DTS Plays file slowly same as above.
Here's a pastebin of this:

That's what I've come up with and I'd really like some help with this. I can only figure out how to get it working on Quicktime and I have many MANY files. I love XBMC and if someone out there has a fix for me that would be great.

I refuse to go back to FrontRow, that's like a step back in time. Blush

If you need more info, just let me know.

I would appreciate anyone's help,

Thanks very much!
This might not be much help, but by your description you don't have an optical output from the mac merging into your HDMI connection.

Do you have something like this:

MiniDisplayPort + Toslink -> HDMI

The link you posted has Mini DisplayPort + USB -> HDMI. USB won't carry the digital audio as far as I know.

Thanks eloncho, I'll grab that cable. Another $50 bucks to spend Laugh

I'll let this forum know if it fixes it though, takes a few days to ship.
Went through all the same steps only my hardware is a brand new mac mini with the same combo optical port that your macbook pro has. I also have a 2.2 intel macbook pro. After getting apple to ship me a 10.5 disk and rolling quicktime back quite a ways on top of everything you did I was still with no passthrough.


I bought an m-audio transit from musicians friend:

Downloaded the latest snow leopard driver and viola. All apps recognize usb transit as an output. As much as I dont like m-audio they do have a long history with apple and it works quite well even with suspend.

I got the toslink + mini display adapter to HDMI converter and then did the pass through settings. All is working well. Thanks for pointing me in the right direction.
Awesome, glad it worked out.

I am pretty new to this forum and don't know the rules about bumping old threads, but since this is related to the problem I have I decided to write here.

Here is my setup in a few words:
MacBook Pro 6.2
Displayport to HDMI cable with standard 1.4
Yamaha RX-v771 receiver (can decode dts, dolby pro etc)
Screen is a panasonic viera

my problem is DTS passthrough through hdmi.

I have selected DTS & AC3 capable receiver in xbmc settings, but i am still not getting the dts on the receiver.

The funny thing is that it worked two days ago with the same settings, but now I am just getting the 5.1 track instead of the dts tracks (and yes, i am sure that the videos i tr have dts. even dolby doesn't get passed through).

Mac audio settings usually show only the screen name, so i tried to unplug the screen. Tried with only the receiver (which was recognized correctly) but that didn't help either.

the receiver doesn't have any settings for dts, ac3, dolby btw. once they are streamed to it the receiver automatically switches. So i have to 'force' xbmc to feed the correct audio track.

how do i do that??
i got the log for more info
had to cut the part after 'stop' to fit everything in

20:54:36 T:2684630336 M:351219712  NOTICE: Starting XBMC, Platform: Mac OS X (10.8.0 i386). Built on Mar  9 2011 (Git:e9e9099)
20:54:36 T:2684630336 M:351219712  NOTICE: special://xbmc/ is mapped to: /Applications/
20:54:36 T:2684630336 M:351219712  NOTICE: special://xbmcbin/ is mapped to: /Applications/
20:54:36 T:2684630336 M:351219712  NOTICE: special://masterprofile/ is mapped to: /Users/lschild/Library/Application Support/XBMC/userdata
20:54:36 T:2684630336 M:351219712  NOTICE: special://home/ is mapped to: /Users/lschild/Library/Application Support/XBMC
20:54:36 T:2684630336 M:351219712  NOTICE: special://temp/ is mapped to: /Users/lschild/.xbmc/temp
20:54:36 T:2684630336 M:351219712  NOTICE: The executable running is: /Applications/
20:54:36 T:2684630336 M:351219712  NOTICE: Log File is located: /Users/lschild/Library/Logs/xbmc.log
20:54:36 T:2684630336 M:351219712  NOTICE:
20:54:36 T:2684630336 M:351334400  NOTICE: Setup SDL
20:54:37 T:2684630336 M:350060544  NOTICE: load settings...
20:54:37 T:2684630336 M:350031872   ERROR: Unable to load libcrystalhd.dylib, reason: dlopen(libcrystalhd.dylib, 1): image not found
20:54:37 T:2684630336 M:350011392  NOTICE: special://profile/ is mapped to: special://masterprofile/
20:54:37 T:2684630336 M:350011392  NOTICE: loading special://masterprofile/guisettings.xml
20:54:37 T:2684630336 M:349839360  NOTICE: Getting hardware information now...
20:54:37 T:2684630336 M:349839360  NOTICE: Checking resolution 12
20:54:37 T:2684630336 M:349835264  NOTICE: Loading player core factory settings from special://xbmc/system/playercorefactory.xml.
20:54:37 T:2684630336 M:349564928  NOTICE: Loaded playercorefactory configuration
20:54:37 T:2684630336 M:349528064  NOTICE: Loading player core factory settings from special://masterprofile/playercorefactory.xml.
20:54:37 T:2684630336 M:349507584  NOTICE: special://masterprofile/playercorefactory.xml does not exist. Skipping.
20:54:37 T:2684630336 M:349474816  NOTICE: No advancedsettings.xml to load (special://masterprofile/advancedsettings.xml)
20:54:37 T:2684630336 M:349466624  NOTICE: Default DVD Player: dvdplayer
20:54:37 T:2684630336 M:349458432  NOTICE: Default Video Player: dvdplayer
20:54:37 T:2684630336 M:349450240  NOTICE: Default Audio Player: paplayer
20:54:37 T:2684630336 M:349376512  NOTICE: Loading media sources from special://masterprofile/sources.xml
20:54:37 T:2684630336 M:341483520  NOTICE: GL_VENDOR = NVIDIA Corporation
20:54:37 T:2684630336 M:341467136  NOTICE: GL_RENDERER = NVIDIA GeForce GT 330M OpenGL Engine
20:54:37 T:2684630336 M:341463040  NOTICE: GL_VERSION = 2.1 NVIDIA-1.6.36
20:54:37 T:2684630336 M:341463040  NOTICE: GL_SHADING_LANGUAGE_VERSION = 1.20
20:54:37 T:2684630336 M:341454848  NOTICE: GL_EXTENSIONS = GL_ARB_transpose_matrix GL_ARB_vertex_program GL_ARB_vertex_blend GL_ARB_window_pos GL_ARB_shader_objects GL_ARB_vertex_shader GL_ARB_shading_language_100 GL_EXT_multi_draw_arrays GL_EXT_clip_volume_hint GL_EXT_rescale_normal GL_EXT_draw_range_elements GL_EXT_fog_coord GL_EXT_gpu_program_parameters GL_EXT_geometry_shader4 GL_EXT_transform_feedback GL_APPLE_client_storage GL_APPLE_specular_vector GL_APPLE_transform_hint GL_APPLE_packed_pixels GL_APPLE_fence GL_APPLE_vertex_array_object GL_APPLE_vertex_program_evaluators GL_APPLE_element_array GL_APPLE_flush_render GL_APPLE_aux_depth_stencil GL_NV_texgen_reflection GL_NV_light_max_exponent GL_IBM_rasterpos_clip GL_SGIS_generate_mipmap GL_ARB_imaging GL_ARB_point_parameters GL_ARB_texture_env_crossbar GL_ARB_texture_border_clamp GL_ARB_multitexture GL_ARB_texture_env_add GL_ARB_texture_cube_map GL_ARB_texture_env_dot3 GL_ARB_multisample GL_ARB_texture_env_combine GL_ARB_texture_compression GL_ARB_texture_mirrored_repeat GL_ARB_shadow GL_ARB_depth_texture GL_ARB_fragment_program GL_ARB_fragment_program_shadow GL_ARB_fragment_shader GL_ARB_occlusion_query GL_ARB_point_sprite GL_ARB_texture_non_power_of_two GL_ARB_vertex_buffer_object GL_ARB_pixel_buffer_object GL_ARB_draw_buffers GL_ARB_shader_texture_lod GL_ARB_color_buffer_float GL_ARB_half_float_vertex GL_ARB_texture_rg GL_ARB_texture_compression_rgtc GL_ARB_framebuffer_object GL_EXT_compiled_vertex_array GL_EXT_draw_buffers2 GL_EXT_framebuffer_object GL_EXT_framebuffer_blit GL_EXT_framebuffer_multisample GL_EXT_texture_rectangle GL_ARB_texture_rectangle GL_EXT_texture_env_add GL_EXT_blend_color GL_EXT_blend_minmax GL_EXT_blend_subtract GL_EXT_texture_lod_bias GL_EXT_abgr GL_EXT_bgra GL_EXT_stencil_wrap GL_EXT_texture_filter_anisotropic GL_EXT_secondary_color GL_EXT_blend_func_separate GL_EXT_shadow_funcs GL_EXT_stencil_two_side GL_EXT_depth_bounds_test GL_EXT_texture_compression_s3tc GL_EXT_texture_compression_dxt1 GL_EXT_texture_sRGB GL_EXT_blend_equation_separate GL_EXT_texture_mirror_clamp GL_EXT_packed_depth_stencil GL_EXT_bindable_uniform GL_EXT_texture_integer GL_EXT_gpu_shader4 GL_EXT_framebuffer_sRGB GL_EXT_provoking_vertex GL_APPLE_flush_buffer_range GL_APPLE_ycbcr_422 GL_APPLE_rgb_422 GL_APPLE_vertex_array_range GL_APPLE_texture_range GL_APPLE_float_pixels GL_ATI_texture_float GL_ARB_texture_float GL_ARB_half_float_pixel GL_APPLE_pixel_buffer GL_APPLE_object_purgeable GL_NV_point_sprite GL_NV_blend_square GL_NV_fog_distance GL_NV_depth_clamp GL_NV_multisample_filter_hint GL_NV_fragment_program_option GL_NV_fragment_program2 GL_NV_vertex_program2_option GL_NV_vertex_program3 GL_NV_conditional_render GL_ATI_texture_mirror_once GL_ATI_texture_env_combine3 GL_ATI_separate_stencil GL_SGIS_texture_edge_clamp GL_SGIS_texture_lod GL_EXT_texture_array GL_EXT_vertex_array_bgra GL_ARB_instanced_arrays GL_ARB_depth_buffer_float GL_EXT_packed_float GL_EXT_texture_shared_exponent
20:54:38 T:2684630336 M:328486912  NOTICE: start dvd mediatype detection
20:54:38 T:2684630336 M:328478720  NOTICE: initializing playlistplayer
20:54:38 T:2684630336 M:328478720  NOTICE: DONE initializing playlistplayer
20:54:38 T:2684630336 M:320815104  NOTICE: initialize done
20:54:38 T:2684630336 M:320798720  NOTICE: Running the application...
20:54:38 T:2684630336 M:320798720  NOTICE: Webserver: Starting...
20:54:38 T:2684630336 M:320790528  NOTICE: WebServer: Started the webserver
20:54:38 T:2684630336 M:320786432  NOTICE: ES: Starting event server
20:54:38 T:2684630336 M:320770048  NOTICE: starting zeroconf publishing
20:54:38 T:2956091392 M:320765952  NOTICE: ES: Starting UDP Event server on
20:54:38 T:2956091392 M:320765952  NOTICE: UDP: Listening on port 9777
20:54:38 T:2684630336 M:320749568   ERROR: CZeroconfOSX::doPublishService CFNetServiceRegister returned (domain = 10, error = -72000)
20:54:38 T:2957758464 M:320253952   ERROR: Previous line repeats 1 times.
20:54:38 T:2957758464 M:320253952 WARNING: FillBuffer: curl failed with code 6
20:54:38 T:2957758464 M:320249856   ERROR: CFileCurl::CReadState::Open, didn't get any data from stream.
20:54:38 T:2957758464 M:320249856   ERROR: WEATHER: Weather download failed!
20:54:38 T:2958364672 M:302010368 WARNING: FillBuffer: curl failed with code 6
20:54:38 T:2958364672 M:302010368   ERROR: CFileCurl::CReadState::Open, didn't get any data from stream.
20:54:38 T:2958364672 M:301850624 WARNING: FillBuffer: curl failed with code 6
20:54:49 T:2684630336 M:277307392  NOTICE: DVDPlayer: Opening: /Volumes/MM 01/Fight.Club.1999.BluRay.1080p.x264.DTS-WiKi/Fight.Club.1999.BluRay.1080p.x264.DTS-WiKi.mkv
20:54:49 T:2684630336 M:277307392 WARNING: CDVDMessageQueue(player)::Put MSGQ_NOT_INITIALIZED
20:54:49 T:2954420224 M:277299200  NOTICE: Creating InputStream
20:54:49 T:2954420224 M:277254144  NOTICE: Creating Demuxer
20:54:49 T:2954420224 M:279527424  NOTICE: Opening video stream: 0 source: 256
20:54:49 T:2954420224 M:279519232  NOTICE: Creating video codec with codec id: 28
20:54:49 T:2954420224 M:275808256  NOTICE: Creating video thread
20:54:49 T:2954420224 M:275800064  NOTICE: Opening audio stream: 1 source: 256
20:54:49 T:2954420224 M:275800064  NOTICE: Finding audio codec for: 86021
20:54:49 T:2954420224 M:275800064  NOTICE: Creating audio thread
20:54:49 T:2959962112 M:275791872  NOTICE: running thread: CDVDPlayerAudio::Process()
20:54:49 T:2959962112 M:275783680  NOTICE: Creating audio device with codec id: 86021, channels: 2, sample rate: 48000, pass-through
20:54:49 T:2959962112 M:275767296 WARNING: CoreAudioRenderer::Initialize: Unable to locate configured device, falling-back to the system default.
20:54:49 T:2959429632 M:275423232  NOTICE: running thread: video_thread
20:54:49 T:2959962112 M:268431360   ERROR: CCoreAudioDevice::SetMixingSupport: Unable to set MixingSupport to 'Off'. Error = 0x65706f6e (nope)
20:54:49 T:2959429632 M:220106752  NOTICE:  fps: 23.975986, pwidth: 1920, pheight: 806, dwidth: 1920, dheight: 806
20:54:49 T:2959429632 M:219901952  NOTICE: Display resolution DESKTOP : 1920x1080 @ 60.00 - Full Screen (12)
20:54:49 T:2684630336 M:219287552  NOTICE: Using GL_TEXTURE_2D
20:54:49 T:2684630336 M:219414528  NOTICE: GL: Selecting Single Pass YUV 2 RGB shader
20:54:49 T:2684630336 M:218521600  NOTICE: GL: NPOT texture support detected
20:54:49 T:2684630336 M:218521600  NOTICE: GL: Using GL_ARB_pixel_buffer_object
22:27:25 T:2684630336 M:387334144  NOTICE: Storing total System Uptime
22:27:25 T:2684630336 M:387334144  NOTICE: Saving settings
22:27:25 T:2684630336 M:387325952  NOTICE: stop all
I guess no one here had a clue about settings to change in mac to achieve pass through Smile

Turns out that there isn't really a setting that has to be changed.

The receiver is displaying only part of the info and by checking all possible display outputs on the receiver I found out that the receiver is actually getting dts / dolby streams Smile

I have also installed perian ( which gives you better control over the sound settings in mac, but I am not sure if it changed anything at the end...

[MAC] AC3 and DTS pass-through help?00